Altman Heavy Duty C-Clamps are robust, industry-standard rigging accessories designed for securely suspending stage lighting fixtures, speakers, and other production equipment from pipes, trusses, and structural supports. Renowned for their strength and reliability in theatrical, concert, and permanent installation environments, these clamps are engineered from high-grade forged or cast steel, providing exceptional load-bearing capacity and durability. Their classic "C" shape design allows them to firmly grip onto a pipe or truss section, with a large, forged steel bolt and a pressure plate applying the clamping force to hold the fixture's yoke in place.

The clamp features a safety-rated design, often including a secondary safety attachment point, such as a hole for a safety cable or a dedicated forged eyelet, ensuring that even in the unlikely event of the main bolt failing, the fixture remains secured. The bolt is typically equipped with a large, easy-to-grip handle or a wingnut for hand-tightening, though some models may require a wrench for final torquing to the manufacturer's specifications. The pressure plate is designed to distribute force evenly and prevent damage to the truss or pipe, while also minimizing slippage.

These clamps are a fundamental component of safe overhead rigging, providing a trustworthy mechanical connection between a fixture and its support. Their simple, proven design, combined with rigorous manufacturing standards and clear weight ratings, makes them an essential and trusted tool for technicians and riggers who prioritize safety and reliability in hanging equipment over stages and audiences.